Device for bending pipes and rods.



G. H. HARRINGTON.

DEVICE FOR BENDING PIPES AND RODS.

APPLICATION FILED MAY 27. ms. 1,289,747.

Patented Dec. 31, 1918.

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3/ 40 30 32 INVENTOR 38 GE 0, hm hW/iR/NTO/V BY 5 4 ATTORNEY a GEORGE HAL HARRINGTON, OF- SEATTLE, WASHINGTON.

DEVICE FOR BENDING PIPES AND RODS.

Application filed May 27, 1918.

To all 'ziihom it may concern:

Be it known that I, GEORGE HAL H RINGTON, a citizen of the United States, and resident of the city of Seattle, county of King, and State of Washington, have invented certain new and useful Improvements in Devices for Bending Pipes and Rods, of which the following is a clear and exact specification. Y

This invention relates to improvements in pipe and rod bending machines and the object of this improvement is to provide a relatively light and portable machine of this nature that is efficient in operation and that may be adjusted to bend pipes or rods to any desired curvature. Y

A. further object is to provide a machine of this nature having a triangular frame the two side members of which are pivoted at the apex and provided at the end opposite the apex with means for adjusting the side members toward or away from each other, and to provide grooved rollers which may be rotatably mounted on the frame members and through wvhich a pipe or bar of metal may be passed when it is to be bent.

The invention consists in the novel construction, adaptation and combination of parts of a pipe bending machine as will be more clearly hereinafter described and claimed.

In the accompanying drawings Figure 1 is a plan view of a bending machine constructed in accordance with this invention. Fig. 2 is a view in side elevation of the same, and Fig. 3 is a View in cross section substantially on a broken line 3-3 of Fig. 2, certain parts being shown in elevation.

In certain forms of structural work and particularly in reinforced concrete construction it is often desired to bend reinforcing rods or pipes into circular shapesof comparatively large diameter. This wvork must necessarily be done at the location where the pipes or rods are being used for the reason that rods of this nature bent to a large diameter cannot be conveniently handled in shipment.

The device herein disclosed is designed especially for this class of work and is mounted on wheels so that it may be easily moved from one place to another.

Referring to the drawings, throughout Specification of Letters Patent.

Patented Dec. 31, 1918. Serial No. 236,696.

which like reference numerals designate like parts, the numerals 5, 6, 7 and 8 designate four frame members respectively.

The members 5 and 6 may be spaced apart by blocks '10 and rigidly secured to each other by bolts 11 as shown in Fig. 2 and the members 7 and 8 may be secured together in spaced apart relation in similar manner.

When thus constructed the members 5 and V 6 will form one side of a triangular frame, while the members 7 and 8 posite side, the members 5 and 6 being pivotally secured to the members 7 and 8 at the apex of the frame by suitable hinges l2.

Extending upwardly through the frame members 5 and 6 are two vertical shafts 13 and 14 upon the top ends of which are fixedly mounted two grooved rollers 15 and 16 respectively.

The shafts 13 and 14 are provided between the frame members 5 and 6 with fixedly mounted gear wheels 17 and 18 of the same pitch diameter that mesh |with each other in such a manner that when one of the shafts 13 or 14 is rotated the other shaft will be rotated therewith at the same speed but in an opposite direction.

The shaft 13 is provided on its top end I with a crank 20 by which it may be rotated.

Extending upwardly through the frame members 7 and 8 in a position substantially opposite the vertical shaft 14 is a pivot 21 upon which is mounted a grooved roller 22.

The grooved rollers 15, 16 and 22 are all located in the same plane so that .when a pipe or rod 23 is inserted between such rollers as shown in Fig. 1 and passed therethrough by'turning the crank 20 it will be bent on a predetermined radius.

The amount of curvature that is imparted to the pipe 23 will be governed by the rela tive distance between the roller 22 andthe roller 16eand this distance may be varied by increasing or decreasing the angle between the two sides of the triangular frame.

I For'the purpose of varying this angle the end of the frame opposite to the apex is provided ,with a tension screw 24 that passes through an enlarged hole 25 in the frame member 7, thence through an enlarged hole 26 in the frame member 5 and is screwed.

through a fixed nut 27 on the inside of the member 5 as more clearly shown in Fig. 3,

:will form the op 7 so that it may be turned by a crank 28 to by the screw 24, it. is obvious'that there will be a force exerted tending to move the bottom frame members 6 and 8 toward each other. This force is ofiset by providing a compression screw '80 that has an enlarged end 31' that is adapted to abut against the frame member 6 and that is provided with a nut 32 that may be screwed outwardly against a plate 33 on the frame member 8.

The rear end of the frame is also adapted to be braced and strengthened by' a cross bar 34L that may be pivoted securely between the frame members 7 and 8 bya bolt 35 and it may project through the space or opening ffbetween the frame members 6 and 5 as more clearly shown in Fig. l. V

The-rear end of the frame is preferably provided with legs 36 and with handles 37,

' ,andthe front end of the frame is preferably j serted ,"within the grooved rollers, and the :crank 20 turned to rotate the rollers 15 and '16 and thereby feed the rods or pipes through the machine,

mounted on wheels '38 on a transverse axle 40 so that the device may be wheeled around like an ordinary wheel-barrow.

, The axle A0, may be pivoted. by a bolt 41 totheframe members on one side and may be secured to the frame members on the opposite sideby a bolt lQthat passes through an arcuate slot {l3 in the axle, the center of curvature of the slot LQbeing the center of r the hinge 12, so that the aXleLO will always be substantially at right angles to the me- I dial plane of the frame regardless of the anrgle of divergence'between the two sides.

: When the deviceis tobe used it may be adjustedr to give the desired curvature, the rods or pipes that are tobe bent may be in- It has been foundin practice and it is not necessary to drivethe roller 22, hence such roller-ismounted for rotation on one side-of'the frame while the two driven rollers 15 and 16 are mounted for rotationon theopposite side of the frame,theieby making it possible to adjust the distance between the re 1 out disturbing the arrangement of the driving mechanism by which the pipe is fed through the several rollers.

It is obvious that changes in the precise form and arrangement of the several parts Jeri M11315 patent may be obtained for together one and disposed between ers l5 and 16-and the roller 22 withembodied in this device maybe resorted to within the scope of the -following claims. ,lVhatIelaim is M .1.A bending machine of the class described comprising, a triangularly shaped frame having two sides that are pivotally connected with each other at the apex, de-

vices adjustably connecting the divergent ends of said sides, grooved rollers mounted on each of'the sides of said frame and means -for driving-certain of sand grooved rollers.

2. A bending machine of the class described comprising a triangula-rly shaped frame having two sides that are pivotally connected with each other'atthe apex,- devices adjustably' connecting the divergent ends of saidframe, a pair of grooved rollers mounted on one part ofsaid frame, means I for driving said pairofrollers,

and a single grooved roller mountedon'the other part'of I said framein the same plane with saidtwo first named rollers.

8. A portable bending machine of the class described comprising two divergent frame members that are pivotally connected atone end, means adj ustably connecting the opposite ends of said-frame members, extending upwardly through one "of {said frame members, gear wheels fixedly, mount two shafts ed on each of said shafts and adapted to mesh with each otherwherebywhen :one of said shafts s. rotated in one direction the liwi other of said shafts will :befrotated in an grooved rollers fixedly 7 opposite direction,

mounted on'thefltop ends of saidlshaftsfa opposite end thereof. 4. A portable bending machine. for pipes single grooved roller mountedflfor rotation I on the other frame member";wheels sup-porting one end of said frame members and han vdles provided on the and rods comprising two divergent frame end each of said frame members-being members that are pivotally connected at one formed of two pieces that are rigidly secured above'the other iii spaced apart I relation, two shafts *extendinggupwardly' I through one of-said frame members,- en

meshed 'gearwheels'mounted on said'shafts the two'pieeesof said i frame member, grooved rollers fixedly secured on-the top ends of said shafts, a sin-j glegrooved roller rotatably mounted on the 9;

other frame member and adaptedto be adjustedwith respect to said two first named; i

rollers toward or away from each other and wheels by moving said two frame members supporting said frame-for movement fronr place to place.

Signed at Seattle, Washington, day of May, 1918.

this 20th HAL HARRINGTON.

five cents each, by addressing the Commissioner of Eaten. walhingtonmrc. 

